Patents by Inventor Philip Wayne Stein

Philip Wayne Stein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Debris separation and filtration systems
    Patent number: 6887290
    Abstract: The invention provides a debris separation-filtration unit comprising a housing; an inlet that receives debris-laden air delivers the air in a tangential, centrifugal airflow-forming manner to the interior of housing; an inner shell that includes a number of airflow passageways; and a debris-capturing filter, the sides of which filter are at least substantially surrounded by the inner shell. Due to the formation of the centrifugal airflow and presence of the inner shell in the housing, only a portion of the debris particles entering the unit come in contact with the filter. The invention also provides debris collection, separation, and filtration systems comprising one or more of the separation-filtration units of the invention; debris collection vehicles comprising one or more of such units or systems; and related methods of collecting, separating, and filtering debris.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: May 3, 2005
    Assignee: Federal Signal Corporation
    Inventors: Daniel P. Strauser, Sean Stuart Troutt, Philip Wayne Stein
  • Debris separation and filtration systems
    Publication number: 20040055470
    Abstract: The invention provides a debris separation-filtration unit comprising a housing; an inlet that receives debris-laden air delivers the air in a tangential, centrifugal airflow-forming manner to the interior of housing; an inner shell that includes a number of airflow passageways; and a debris-capturing filter, the sides of which filter are at least substantially surrounded by the inner shell. Due to the formation of the centrifugal airflow and presence of the inner shell in the housing, only a portion of the debris particles entering the unit come in contact with the filter. The invention also provides debris collection, separation, and filtration systems comprising one or more of the separation-filtration units of the invention; debris collection vehicles comprising one or more of such units or systems; and related methods of collecting, separating, and filtering debris.
    Type: Application
    Filed: September 25, 2002
    Publication date: March 25, 2004
    Applicant: Federal Signal Corporation
    Inventors: Dan P. Strauser, Sean Stuart Troutt, Philip Wayne Stein